Thanks for your response. I am taking your advice.
I believe that the 24" between trusses needs thicker decking, hence the sag.
I’m concerned about voiding the shingle warranty, ability to support snow or someone walking, premature wear and leaks, and code.
Local code references the 2009 IBC but I have trouble navigating to the specific page.
sag doesn’t look as bad from the side but still bad.
http://https://lh3.googleusercontent.com/g1gewwvE9okl4gzMONfUO4lWqPdtKuZBPdegk7nYXfUy2xpEv3CXIsKy92pFdFfCWfbiN3HrJTDKnYYf_DH5hbRxjTo_gLOQ1oI5YwCgB3kpERE2G29AZct-Trbovv275HFEuNbtHz1nZb6GSTbjRiSZHeeIFpZbba_rXokz3LAWbHhgFkFjPtJnD2Dz8FQjbVRHbD3IG-ynOATDpL9Va_C0OTuEM2s1TkemECGY9AWwbm5jEXAlr5t-sOwne5D2IWMHPa_9Xxj3Tw5S4W685bRNgLkS8_gU4p-ROsQf9ha24lsCLJhTbyw30Q3NK9LYAW75R7QfdvT8HdBX8GwJMEQ-bjH7RgXGRIQt6oGjNtk_zR3FpIN0dHnFWciP_e5PUKO5MTdiBKF0axIX8fI_GuNmU7XRFzMcoGBU7F0jVEHso_HVtKMT72uKZZaSVmzHealm1r4Ud4shu6oawBtrVsXAWaltlFpgsavZ4Uc8WjMQ82tjuXaLu2nJEtWQfgMGk1eHHG58NWkrB-h9DJKYo9iJUFx4vtywdEOLgCU6_22SkpWFuPWoeA7oS5F1hPJVI1Kp=w1280-h960-no
In my opinion water damage looks severe and this should have been replaced